When you get into a freezing cold automobile and your body heat causes the windows to fog over, draw a swastika in one of the windows. Ouila -- You've got a staff car! The next day when your parents get in the car, the windows re-fog and they too can drive to work in a staff car. Guaranteed laffs for the entire family!
"You see, officer it was a joke. We turned our Yugo into a staff car. Get it?"